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引用本文:汪财生,李共国.疏浚后杭州西湖的桡足类.湖泊科学,2006,18(6):643-648. DOI:10.18307/2006.0613
WANG Caisheng,LI Gongguo.A Study on the Copepoda community in West Lake, Hangzhou after dredging. J. Lake Sci.2006,18(6):643-648. DOI:10.18307/2006.0613
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疏浚后杭州西湖的桡足类
汪财生, 李共国
浙江万里学院生物浙江万里学院生物技术研究所, 宁波315100
摘要:
本文调查了疏浚后杭州西湖(小型、浅水、富营养化湖泊)四个采样站(Ⅰ-Ⅳ)桡足类的密度、生物量和多样性指数,并对桡足类生物量与水质理化因子之间进行了相关分析.共发现桡足类9种,其中哲水蚤3种,剑水蚤6种.疏浚后,桡足类群落密度随着引水水流路程的加大而逐渐增大,多样性指数逐渐下降.桡足类群落丰度夏秋季明显大于冬春季.汤匙华哲水蚤(Sinocalanus dorrii)成体在营养水平较低的Ⅰ站(TLI=55.3)具有较大的密度和生物量,其分市沿着引流方向逐渐下降,而哲水蚤的桡足幼体则沿引流方向逐渐增加;粗壮温剑水蚤(Thermocyclops dybowskii)成体在营养水平较高的Ⅱ-Ⅳ站(TLI=62.7-63.5)具有较大的密度和生物量;疏浚使底柄种类猛水蚤(Harpacticoida)消失了.疏浚对哲水蚤密度分布分异的影响较大,对剑水蚤密度分布分异的影响较小.桡足类群落Ⅱ-Ⅲ站桡足类生物量随水体叶绿素a、高锰酸盐指数和总磷含量的升高而显著增加,随水体透明度的增大而显著下降.
关键词:  疏浚  桡足类  杭州西湖  群落
DOI:10.18307/2006.0613
分类号:
基金项目:国家自然科学基金项目(39170169)资助.
A Study on the Copepoda community in West Lake, Hangzhou after dredging
WANG Caisheng, LI Gongguo
Institute of Biotechnology, Zhejiang Wanli University, Ningbo 315100 P. R. China
Abstract:
Based on the data of the species abundance, biomass,diversity index of Copepoda and regression analysis between its biomass and factors of the water quality were studied al stations (from I to IV) of West Lake Hangzhou,a shallow eutrophic lake after dredging treatment. During the survey in 2003,9 species of Copepoda (3 Cal-anoida and 6 Cyclopoida) were identified from the quantitative samples. The density of Copepoda community increased after the drawing water current, but diversity index decreased. The abundance of Copepoda was much higher in Summer-Autumn than that in Winter-Spring season. Sinocaianus dorrii adults was more abundant al Station I with relatively lower trophic status. (TLI =55.3),decreased along drawing water current, and Caianoida copep-odids density increased following the water current, while Thermocyclops dybowskii adults was more abundant at Stations II-IV with relatively higher trophic status (TLI =62.7-63.5),Harpacticoida disappeared after d reding treatment. The effect of dreding treatment on Caianoida community heterogeneity of distribution was much stronger than that on Cyclopoida community. The biomass of Copepoda was positively correlative with Chlorophyll-a, CODMn and total phosphorus, while negatively with water transparency at Stations Ⅱ-Ⅲ
Key words:  Dreging treatment  Copepoda community  West Lake, Hangzhou
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